Operation Testing and Load Assessments

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Questions and Answers

Which testing method is NOT mentioned as a common test used after an examination?

Induction testing (correct)

Non-destructive testing

Pressure tests

Calibration checks

What should be done immediately if an examination reveals a defect?

Ignore the defect

Conduct a re-examination

Wait for the formal report

Notify the user promptly (correct)

Which type of sling is mentioned as being less pliable compared to other textile slings?

Webbing slings

Rope slings (correct)

Chain slings

Round slings

What is a necessary step to ensure the accuracy of a formal report?

Have the contemporary record available Signup and view all the answers

Which characteristic makes identification of various fibre slings extremely difficult?

The fibres visually appear very similar. Signup and view all the answers

Which aspect of fibre slings contributed to their decline in popularity?

Their bulkiness and handling difficulties Signup and view all the answers

What type of record should be kept at the time of the examination?

A contemporary record Signup and view all the answers

Which testing method is often required to inform enforcing authorities of certain defects?

Proof load testing Signup and view all the answers

What is the maximum allowable wear for metal terminal components according to LEEA guidelines?

8% Signup and view all the answers

Which condition indicates that a sling might be experiencing excessive wear?

Fraying of the yarns Signup and view all the answers

What should be done if a fibre sling is found to be soiled?

Wash it with clean water or follow the manufacturer's instructions Signup and view all the answers

What effect does mildew have on natural fibre rope slings?

Significantly reduces strength Signup and view all the answers

What specific defect should be assessed in terminal fittings?

Twisting, permanent deformation, and signs of overloading Signup and view all the answers

Which type of damage is caused by a sling passing over a sharp edge while under tension?

Localized areas of abrasion Signup and view all the answers

What does excessive disarrangement of fibers in synthetic ropes indicate?

Sign of severe damage Signup and view all the answers

Which of the following is NOT a defect that should be assessed in fibre rope slings?

Color fading of the sling Signup and view all the answers

What is the primary advantage of using webbing slings over chains or ropes when lifting loads?

They distribute the load across their full width. Signup and view all the answers

What does the term 'sewn webbing component' refer to?

The woven webbing and its stitching. Signup and view all the answers

What is the purpose of treating the ends of cut webbing?

To prevent fraying and coming apart. Signup and view all the answers

Why are stitching loops above the surface of the webbing problematic?

They can get caught and damaged during use. Signup and view all the answers

What stitch type is used for sewing the webbing component?

Lockstitch Signup and view all the answers

What does the Working Load Limit (WLL) indicate?

The maximum load during a straight pull. Signup and view all the answers

Which material treatment method is typically used for cut webbing ends?

Heating to melt and seal Signup and view all the answers

In what condition is the SWL of a single leg sling equal to its WLL?

When used in straight pull. Signup and view all the answers

Which type of fibre rope is not susceptible to mildew?

HMPE Signup and view all the answers

What is the maximum temperature at which polyester fibre ropes can safely be used?

100°C Signup and view all the answers

Which component is NOT a critical part of textile slings?

Conditioning agents Signup and view all the answers

What should be avoided when marking slings?

Harmful markings on the sling Signup and view all the answers

What is the impact of ultra-violet light on man-made fibre ropes?

Causes solar degradation Signup and view all the answers

Where should slings that incorporate links be marked?

On a tag permanently attached to the master link Signup and view all the answers

Which of the following temperature ranges is correct for Aramid Polyamide ropes?

-50°C to 130°C Signup and view all the answers

What is the recommended approach regarding the routine overload testing of slings?

Not recommended by LEEA unless mandated Signup and view all the answers

What is the potential consequence of using materials that are corroded in lifting applications?

Catastrophic brittle failures Signup and view all the answers

What temperature range is suitable for polyester roundslings?

-40°C to 100°C Signup and view all the answers

What happens to polyamide fibers when they get wet?

They lose up to 15% of their strength Signup and view all the answers

Why is it important to keep slings dry at low temperatures?

To avoid ice formation that can damage the sling Signup and view all the answers

What is solar degradation and which materials are most affected by it?

A weakening effect from UV exposure; man-made fibers Signup and view all the answers

What component is NOT considered critical for the safety of a roundsling?

Belt length Signup and view all the answers

Which factor does NOT affect the strength of polyester or polypropylene slings when wet?

They experience no strength loss Signup and view all the answers

What is the effect of moisture on roundslings at extremely low temperatures?

It can lead to ice formation and damage Signup and view all the answers

Study Notes

Common Tests for Equipment Examination

Operation testing verifies overall functionality.
SWL (Safe Working Load) and deflection tests assess load-bearing capabilities.
Proof load testing confirms the equipment can handle specified weights without failure.
Light load testing evaluates performance under normal operational conditions.
Calibration checks ensure equipment operates within set parameters.
Insulation and continuity testing confirm electrical safety and functionality.
Pressure tests check the integrity of vessels and components under pressure.
Non-destructive testing identifies internal flaws without damaging the equipment.

Documentation and Records

A formal report is generated post-examination for record-keeping.
Contemporary records must be authenticated, dated, and retained for future reference.
Immediate notification is required for users if defects are detected, especially if hazardous.
Specific defects must be reported to enforcing authorities in some regions.

Fibre Slings Overview

Use of fibre rope slings is declining; webbing and roundslings are preferred.
Maritime industry still utilizes fibre slings, made from various strand ropes, often hand-spliced.
Natural fibre ropes can be bulky and rough, offering less pliability than synthetic options.
Must be checked for mildew growth which can weaken the rope.
Man-made fibre ropes resist mildew but may suffer from UV damage.

Temperature Ranges for Fibre Rope Slings

Manila, Sisal, Hemp, Polypropylene: -40°C to 80°C
Polyester and Polyamide (Nylon): -40°C to 100°C
HMPE: -40°C to 70°C
Aramid Polyamide: -50°C to 130°C

Critical Components of Textile Slings

Rope integrity is essential for load-bearing capacity.
Terminal fittings (master links, hooks) must be free of damage.
Thimble eye protection is crucial to prevent rope wear.
Proper splicing techniques ensure the safety and longevity of the sling.
Identification labels must be present for compliance and safety verification.

Marking Requirements for Slings

Markings should protect the sling's integrity and should be made on a plastic sleeve or tag.
Tags must be securely attached to prevent damage during use.
Required information includes SWL, identification details aligned with legislation, and applicable standards.

Examination Scope for Defects

Inspect thimbles for signs of collapse, cracks, or twisting.
Assess fibre ropes for contact damage with fittings and general soiling.
Evaluate terminal fittings for deformation or overloading.
Maximum wear for metal terminal components should not exceed 8%.
Localized wear indicates mishandling or inadequate care during use.

Sewn Webbing Component

Comprises woven webbing and stitching; all threads used are of the same material quality.
Lockstitch method ensures stability and prevents stitching loops from catching during use.
Ends of cut webbing are treated to prevent fraying and maintain integrity.

Working Load Limit (WLL)

WLL indicates the maximum load for straight pulls and is crucial for operational safety.
Selection of slings must account for environmental factors like chemical exposure, which can affect strength.

Effects of Temperature and UV Exposure

Roundslings' efficacy varies by material; polypropylene and polyester are rated for different temperature ranges.
Moisture at low temperatures can lead to ice formation, damaging the sling.
Solar degradation affects all textile fibres, leading to brittleness in synthetic materials over time.

Summary of Critical Components

Essential components include cover, stitching, metal fittings, and identification labels, all vital for sling safety and functionality.

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Description

This quiz covers various common tests used in operation testing, including SWL and deflection tests, proof load testing, and more. Understand the importance of these tests in ensuring thorough examinations and compliance with safety standards.